diff --git a/scripts/pyaudio3dtools/audioarray.py b/scripts/pyaudio3dtools/audioarray.py
index f548622242c0cab1dae59c21c2709a34c0788e39..7ebc12e2b00bc179867d6ed264b58d3838b4611a 100644
--- a/scripts/pyaudio3dtools/audioarray.py
+++ b/scripts/pyaudio3dtools/audioarray.py
@@ -379,8 +379,8 @@ def compare(
                 wavfile.write(str(tmpfile_test), 48000, test_tmp)
                 del test_tmp
             else:
-                wavfile.write(str(tmpfile_ref), 48000, ref)
-                wavfile.write(str(tmpfile_test), 48000, test)
+                wavfile.write(str(tmpfile_ref), 48000, ref.astype(np.int16))
+                wavfile.write(str(tmpfile_test), 48000, test.astype(np.int16))
 
             cmd = [
                 str(wdiff),